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| author | Hans de Goede <hdegoede@redhat.com> | 2017-04-16 18:30:31 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2017-05-01 12:51:20 +0300 |
| commit | 2848e039c562a5278cd2ebc5b005c0f1a381b34e (patch) | |
| tree | 757b3d88a4b55704ab13abb1090873342205ba14 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 19a2ee69c20255157738402b6fdbcf5d708dad80 (diff) | |
| download | linux-2848e039c562a5278cd2ebc5b005c0f1a381b34e.tar.xz | |
power: supply: Make power_supply_am_i_supplied return -ENODEV if there are no suppliers
It is sensible to assume that the hardware actually always has a
way of charging the battery so when power_supply_am_i_supplied does not
find any suppliers, that does not mean that there are none, but simply
that no power_supply-drivers are registered / bound for any suppliers for
the supply calling power_supply_am_i_supplied.
At which point a fuel-gauge driver calling power_supply_am_i_supplied()
cannot determine whether the battery is being charged or not.
Allow a caller of power_supply_am_i_supplied to differentiate between
there not being any suppliers, vs no suppliers being online by returning
-ENODEV if there are no suppliers matching supplied_to / supplied_from,
which allows fuel-gauge drivers to return POWER_SUPPLY_STATUS_UNKNOWN
rather then POWER_SUPPLY_STATUS_DISCHARGING if there are no suppliers.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions